621320732 has 6 divisors (see below), whose sum is σ = 1087311288. Its totient is φ = 310660364.

The previous prime is 621320731. The next prime is 621320747. The reversal of 621320732 is 237023126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621320731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77665088 + ... + 77665095.

It is an arithmetic number, because the mean of its divisors is an integer number (181218548).

Almost surely, 2^621320732 is an apocalyptic number.

It is an amenable number.

621320732 is a deficient number, since it is larger than the sum of its proper divisors (465990556).

621320732 is a wasteful number, since it uses less digits than its factorization.

621320732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155330187 (or 155330185 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 621320732 is about 24926.3060239579. The cubic root of 621320732 is about 853.3069477654.

Adding to 621320732 its reverse (237023126), we get a palindrome (858343858).

The spelling of 621320732 in words is "six hundred twenty-one million, three hundred twenty thousand, seven hundred thirty-two".